From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx3.redhat.com (mx3.redhat.com [172.16.48.32]) by int-mx1.corp.redhat.com (8.13.1/8.13.1) with ESMTP id m4A185iO023208 for ; Fri, 9 May 2008 21:08:05 -0400 Received: from py-out-1112.google.com (py-out-1112.google.com [64.233.166.177]) by mx3.redhat.com (8.13.8/8.13.8) with ESMTP id m4A17ofR028016 for ; Fri, 9 May 2008 21:07:50 -0400 Received: by py-out-1112.google.com with SMTP id a29so1290052pyi.0 for ; Fri, 09 May 2008 18:07:49 -0700 (PDT) Message-ID: <4824F560.208@davidcoulson.net> Date: Fri, 09 May 2008 21:07:44 -0400 From: David Coulson MIME-Version: 1.0 Subject: Re: [linux-lvm] Offline fsck (checking snapshots) References: <48110C2D.5020800@kadzban.is-a-geek.net> In-Reply-To: <48110C2D.5020800@kadzban.is-a-geek.net> Content-Type: multipart/alternative; boundary="------------060209080000070809000205" Reply-To: LVM general discussion and development List-Id: LVM general discussion and development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , List-Id: To: LVM general discussion and development This is a multi-part message in MIME format. --------------060209080000070809000205 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit I've been playing with this script today - Is there a more current version, or someone who maintains it? There are a bunch of things that seem to be broken that I ended up cleaning up on my own (e.g. it calculates the snapshot size in M, then creates it in extents...). I imagine there are other users who are frustrated with it, as it does not run cleanly as it is. David Bryan Kadzban wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: RIPEMD160 > > There was some discussion on the ext3-users list a few months ago, about > how e2fsck took a long time to run, and it was getting forced because it > keeps track of a couple of counters that can force it (the counters are > days since the last full fsck, and mounts since the last full fsck). > (The thread starts at [1], the script development started at [2], and > the most recent version is at [3]. The one extra thing I've added is > skipping ext2/3 FSes that have an external journal.) > > The suggestion was made that if the user is using LVM, a temporary > snapshot could be taken, and then fsck could be run on that. If it > succeeds, then it's possible to set the last-fsck-time and mount-count > while the real FS is mounted. > > I've gotten a script that I think is reasonable, that handles this. > With some help from others, it now works with XFS as well as ext2/3, and > it's supposed to also work with JFS. Since it requires LVM, I think it > might make sense to put something like it into the LVM userspace tools. > > (There is one issue: it also requires blkid and logsave from e2fsprogs. > I could work around the requirement for logsave (using tee -a), but > blkid would be harder.) > > The idea behind the script is, you run it at night from cron; it will > check each LV on the system and mail a user if there are any problems. > It also logs to syslog. > > I've attached the script and its configuration file to this message. > Comments? > > [1] https://www.redhat.com/archives/ext3-users/2008-January/msg00027.html > > [2] https://www.redhat.com/archives/ext3-users/2008-January/msg00032.html > > [3] > https://www.redhat.com/archives/ext3-users/2008-February/msg00004.html > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.7 (GNU/Linux) > Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org > > iD8DBQFIEQwpS5vET1Wea5wRA43cAKDWGJVFgV6fmJKeQUgcPH6Ebd1aygCfb4a9 > TbiWVGUYFnPeQSWiJVl0x2k= > =Juq0 > -----END PGP SIGNATURE----- > > ------------------------------------------------------------------------ > > _______________________________________________ > linux-lvm mailing list > linux-lvm@redhat.com > https://www.redhat.com/mailman/listinfo/linux-lvm > read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ --------------060209080000070809000205 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit I've been playing with this script today - Is there a more current version, or someone who maintains it? There are a bunch of things that seem to be broken that I ended up cleaning up on my own (e.g. it calculates the snapshot size in M, then creates it in extents...).

I imagine there are other users who are frustrated with it, as it does not run cleanly as it is.

David

Bryan Kadzban wrote: 
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Hash: RIPEMD160

There was some discussion on the ext3-users list a few months ago, about
how e2fsck took a long time to run, and it was getting forced because it
keeps track of a couple of counters that can force it (the counters are
days since the last full fsck, and mounts since the last full fsck).
(The thread starts at [1], the script development started at [2], and
the most recent version is at [3].  The one extra thing I've added is
skipping ext2/3 FSes that have an external journal.)

The suggestion was made that if the user is using LVM, a temporary
snapshot could be taken, and then fsck could be run on that.  If it
succeeds, then it's possible to set the last-fsck-time and mount-count
while the real FS is mounted.

I've gotten a script that I think is reasonable, that handles this.
With some help from others, it now works with XFS as well as ext2/3, and
it's supposed to also work with JFS.  Since it requires LVM, I think it
might make sense to put something like it into the LVM userspace tools.

(There is one issue: it also requires blkid and logsave from e2fsprogs.
I could work around the requirement for logsave (using tee -a), but
blkid would be harder.)

The idea behind the script is, you run it at night from cron; it will
check each LV on the system and mail a user if there are any problems.
It also logs to syslog.

I've attached the script and its configuration file to this message.
Comments?

[1] https://www.redhat.com/archives/ext3-users/2008-January/msg00027.html

[2] https://www.redhat.com/archives/ext3-users/2008-January/msg00032.html

[3]
https://www.redhat.com/archives/ext3-users/2008-February/msg00004.html
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iD8DBQFIEQwpS5vET1Wea5wRA43cAKDWGJVFgV6fmJKeQUgcPH6Ebd1aygCfb4a9
TbiWVGUYFnPeQSWiJVl0x2k=
=Juq0
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